An endoscope is a fiber-optic medical instrument that emits light. Doctors can insert endoscopes into hollow body parts. Which property of fiber-optic strands makes them most useful in endoscopes?

Endoscopes must fit into narrow, curved spaces inside the body. Fiber-optic strands are small and flexible, so they can be guided through these spaces to carry light and images. Their ability to transmit data quickly is useful in communications, but it is not the main property that makes them suitable for insertion into the body.

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